What issue may cause a vehicle to pull in one direction while driving?

A vehicle pulling in one direction while driving is often a result of alignment issues. When the wheels are not properly aligned, it can cause uneven tire wear and result in the vehicle veering to one side. This misalignment may occur due to hitting a pothole or curb, or simply from wear and tear over time. Proper wheel alignment ensures that all wheels are parallel to each other and perpendicular to the ground, allowing for stable and straight driving.

While other factors like tire pressure differences can also cause a vehicle to pull to one side, it is less common than alignment issues. Brake failure and engine malfunctions would typically manifest in more severe handling problems rather than just pulling. Thus, alignment issues are the most direct cause of a vehicle pulling in one direction while being driven.